Results indicated that there were significant indirect effects of alc-GPS on alcohol use via sensation seeking and social support. Specifically, alc-GPS was associated with higher levels of alcohol use indirectly via higher sensation seeking (B = .127, 95% CI = [.064, .213]). alc-GPS was also associated with more alcohol use indirectly via lower levels of social support from family (B = .042, 95% CI = [.005, .118]). There were no significant indirect effects of alc-GPS on alcohol use via social support from friends (B = .034, 95% CI = [−.032, .112].